in-line Wago connector

ElectroChem · Feb 6, 2022

pc1966 said:
I have seen that with DIN terminals where the larger size is single solid core, and the smaller the stranded size. Odd, as I would have expected it the other way round!

Presumably no data sheet for those?

I think you can get a larger solid core in there because the fine strands will catch and fray on the edges of the terminal if you try and shove one in.

Spoon · Feb 6, 2022

ElectroChem said:
I think you can get a larger solid core in there because the fine strands will catch and fray on the edges of the terminal if you try and shove one in.

The lever type that is shown above are designed for stranded cable.
Could always put a ferrule on the stranded cable if not a lever type.

nicebutdim · Feb 6, 2022

Wago 221 suitable for 0.2 - 2.5mm2 stranded and 0.2 - 4.0mm solid.

Chances are, as previously suggested, that's why Ideal have 4mm in parenthesis.

https://www.wago.com/gb/installation-terminal-blocks-and-connectors/inline-splicing-connector-with-lever/p/221-2411

There was a recent discussion sparked by @camoelectric/@Electrics/@biddlybwah that raised the subject of ferruled fine stranded conductors in spring clamp connectors. I think it was @Lucien Nunes who provided sound reasoning why this was less than ideal.

ElectroChem · Feb 6, 2022

Spoon said:
The lever type that is shown above are designed for stranded cable.
Could always put a ferrule on the stranded cable if not a lever type.

I should clarify. Yes. they're designed for stranded cable, but if you try to shove too large a stranded cable in, the edges will catch and fray. Putting a ferrule on solves that problem but also increases the CSA by the amount of metal in the ferrule, hence smaller rated sizes for stranded vs solid.